[Feature] Add utility function to return random number from 0 to 1

src/libutil/util.c

@@ -2027,7 +2027,7 @@ rspamd_hash_seed (void)
 }
 
 gdouble
-rspamd_time_jitter (gdouble in, gdouble jitter)
+rspamd_random_double (void)
 {
 	guint64 rnd_int;
 	double res;
@@ -2037,11 +2037,17 @@ rspamd_time_jitter (gdouble in, gdouble jitter)
 	res = rnd_int;
 	res *= transform_bias;
 
+	return res;
+}
+
+gdouble
+rspamd_time_jitter (gdouble in, gdouble jitter)
+{
 	if (jitter == 0) {
 		jitter = in;
 	}
 
-	return in + jitter * res;
+	return in + jitter * rspamd_random_double ();
 }
 
 gboolean

src/libutil/util.h

@@ -409,6 +409,12 @@ guint64 rspamd_hash_seed (void);
  */
 gdouble rspamd_time_jitter (gdouble in, gdouble jitter);
 
+/**
+ * Return random double in range [0..1)
+ * @return
+ */
+gdouble rspamd_random_double (void);
+
 /**
  * Constant time version of memcmp
  */